MODEL: LTRPN

LTRPN SPECIFICATIONS

ES-3358 Rev.10 Page 2/3

https://www.m-system.co.jp/

Zero adjustment: -5 to +5 % (front)

Span adjustment: 95 to 105 % (front)

INPUT SPECIFICATIONS

Frequency: 50 or 60 Hz

■ VOLTAGE INPUT

Operational range: 85 – 110 % of rating

Overload capacity: 150 % of rating for 10 sec., 110 %

continuous

■ CURRENT INPUT

Operational range: 0 – 120 % of rating

Overload capacity: 4000 % of rating for 1 sec., 2000 % for 4

sec., 120 % continuous

■ How To Determine Var Range

Calibration Range [var] = (Measuring Range) ÷

((VT Ratio) × (CT Ratio))

Check that the required calibration range is within the

available range in the table.

[example]

3-phase / 3-wire, measuring range 75 kvar,

VT 220 / 110 V, CT 250 / 5 A

• 3-phase / 3-wire

INPUT

USABLE RANGE

BURDEN (VA)

VT / CT

STD.RANGE

VT

CT

CODE

1 / 1

200 var

100 – 240 var

P

0.1/ph

1 / 2

400 var

200 – 480 var

P

0.2/ph

1 / 5

1000 var

500 – 1200 var

0.5/ph

2 / 1

400 var

200 – 480 var

P

0.1/ph

2 / 2

800 var

400 – 960 var

P

0.2/ph

2 / 5

2000 var

1000 – 2400 var

0.5/ph

• 3-phase / 4-wire

INPUT

USABLE RANGE

BURDEN (VA)

VT / CT

STD.RANGE

VT

CT

CODE

1 / 1

200 var

100 – 240 var

P

0.1/ph

1 / 2

400 var

200 – 480 var

: 2.5

0.2/ph

1 / 5

1000 var

500 – 1200 var

P

0.5/ph

2 / 1

400 var

200 – 480 var

P

0.1/ph

2 / 2

800 var

400 – 960 var

: 2.5

0.2/ph

2 / 5

2000 var

1000 – 2400 var

P

0.5/ph

4 / 1

800 var

400 – 880 var

P

0.1/ph

4 / 2

1600 var

800 – 1760 var

P

0.2/ph

4 / 5

4000 var

2000 – 4400 var

P

0.5/ph

OUTPUT SPECIFICATIONS

■ DC Current: -10 – +20 mA DC

Span: Min. 1 mA, max. 20 mA

Offset: Max. 1.5 times span

Load resistance: Output drive 10 V max.

■ DC Voltage: -10 – +12 V DC

Minimum span: 5 mV

Offset: Max. 1.5 times span

Load resistance: Output drive 1 mA max. at ≥ 0.5 V

12

OUT

20mA

0

1000var

(Lead)

1000

(Lag)

0

OUT

+10V

4

12

OUT

20mA

0

OUT

+10V

4

-10V

-10V

0

1000var

(Lead)

1000

(Lag)

0

1000var

(Lead)

1000

(Lag)

0

1000var

(Lead)

1000

(Lag)

• Negative in lag, positive in lead

• Negative in lead, positive in lag

OPERATION DIAGRAM (example)

INSTALLATION

Operating temperature: -10 to +55°C (14 to 131°F)

Operating humidity: 30 to 85 %RH (non-condensing)

Mounting: Surface or DIN rail

Weight: 450 g (0.99 lb)

PERFORMANCE in percentage of span

Accuracy: ±0.5 % (at 23°C ±10°C or 73.4°F ±18°F,

45 – 65 Hz)

Magnetic field (ext. origin) effect: ± 0.5 % (400 A/m)

Response time: ≤ 2 sec. (0 – 100 % ±1 %)

Ripple: 0.5 %p-p max.

Insulation resistance: ≥ 100 MΩ with 500 V DC

Dielectric strength: 2000 V AC @ 1 minute

(voltage input to current input to output to ground)

Impulse withstand voltage: 1.2 / 50 μsec., ±5 kV

(input to output or ground)

STANDARDS & APPROVALS

EU conformity:

EMC Directive

EMI EN 61000-6-4

EMS EN 61000-6-2

Low Voltage Directive

EN 61010-1

Measurement Category II (input)

Pollution Degree 2

Input to output: Reinforced insulation (300 V)

RoHS Directive